NO763902L - - Google Patents
Info
- Publication number
- NO763902L NO763902L NO763902A NO763902A NO763902L NO 763902 L NO763902 L NO 763902L NO 763902 A NO763902 A NO 763902A NO 763902 A NO763902 A NO 763902A NO 763902 L NO763902 L NO 763902L
- Authority
- NO
- Norway
- Prior art keywords
- starch
- polyvinyl alcohol
- approx
- weight
- water
- Prior art date
Links
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 48
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 45
- 229920002472 Starch Polymers 0.000 claims description 43
- 239000008107 starch Substances 0.000 claims description 43
- 235000019698 starch Nutrition 0.000 claims description 43
- 238000002360 preparation method Methods 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 8
- 230000007062 hydrolysis Effects 0.000 claims description 7
- 238000006460 hydrolysis reaction Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 44
- 239000000853 adhesive Substances 0.000 description 29
- 230000001070 adhesive effect Effects 0.000 description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 11
- 229910021538 borax Inorganic materials 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 235000010339 sodium tetraborate Nutrition 0.000 description 10
- 239000004328 sodium tetraborate Substances 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000003431 cross linking reagent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 235000002639 sodium chloride Nutrition 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- BAQSIYCDSSZDHG-UHFFFAOYSA-L calcium sodium hydrogen carbonate hydroxide Chemical compound C([O-])(O)=O.[Na+].[OH-].[Ca+2] BAQSIYCDSSZDHG-UHFFFAOYSA-L 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- -1 formaldehyde, ketone Chemical class 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- YIBPLYRWHCQZEB-UHFFFAOYSA-N formaldehyde;propan-2-one Chemical compound O=C.CC(C)=O YIBPLYRWHCQZEB-UHFFFAOYSA-N 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000009973 maize Nutrition 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09J103/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
- C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1025—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Paper (AREA)
Description
Foreliggende oppfinnelse angår forbedrede klebemidler og spesielt et forbedret boratert korrugerende klebemiddel på stivelsesbasis modifisert med polyvinylalkohol. The present invention relates to improved adhesives and in particular an improved borate corrugating adhesive on a starch basis modified with polyvinyl alcohol.
US patent 2.102.937 angår et klebepreparat omfattende gelatinert stivelse, ugelatinert stivelse, et alkali og borax i US patent 2,102,937 relates to an adhesive preparation comprising gelatinized starch, ungelatinized starch, an alkali and borax in
vann. Denne blanding ga et klebenivå ved fremstilling av bølge-papp til å danne tilfredsstillende bindinger mellom papirflåtene. water. This mixture provided an adhesive level in the manufacture of corrugated board to form satisfactory bonds between the paper webs.
Det kjennetegnende trekk ved denne oppfinnelse var anvendelsen av ugelatinert stivelse. Under bruksbetingelsene gelatinerte den ugelatinerte stivelse hurtig under varmen og trykket ved punktet The distinguishing feature of this invention was the use of ungelatinized starch. Under the conditions of use, the ungelatinized starch gelatinized rapidly under the heat and pressure at the point
for dannelse av bølgepappstrukturen. Gelatineringen førte til en hurtig økning i viskositet og klebeevnen av klebepreparatet. Borax ble anvendt i preparatet for å øke viskositetsnivået under det endelige gelatineringstrinn. Denne fremgangsmåte revolusjon-erte bølgepappindustrien. Grunnprosessen beskrevet i dette patent og dets ledsagende patent omtalt nedenfor er fremdeles i det vesentlige den eneste fremgangsmåte som anvendes ved fremstilling av bølgepapp hittil. for forming the corrugated board structure. The gelatinization led to a rapid increase in the viscosity and the adhesiveness of the adhesive preparation. Borax was used in the preparation to increase the viscosity level during the final gelatinization step. This method revolutionized the corrugated board industry. The basic process described in this patent and its accompanying patent discussed below is still essentially the only method used in the production of corrugated cardboard to date.
Det ledsagende patent til det ovennevnte, US patent 2.051.025 er rettet på en fremgangsmåte ved fremstilling av bølgepapp under anvendelse av klebemidlet ifølge US patent 2.102.937. The companion patent to the above, US patent 2,051,025 is directed to a method for the production of corrugated board using the adhesive according to US patent 2,102,937.
US patent 3-498-869 angår et bølgepappklebemiddel bestående av en vandig suspensjon av finfordelt fast polyvinylalkohol som er i. det vesentlige uoppløselig i vann ved inntil ca. 45°C og er lett oppløselig over ca. 80°C (dvs. at minst 70 vekt% av polyvinylalkoholen vil forbli som usvellet fast stoff ved temperaturer opptil ca. 45°C og minst 80 vekt% av polyvinylalkoholen vil hurtig US patent 3-498-869 relates to a corrugated board adhesive consisting of an aqueous suspension of finely divided solid polyvinyl alcohol which is essentially insoluble in water at up to approx. 45°C and is easily soluble over approx. 80°C (i.e. that at least 70% by weight of the polyvinyl alcohol will remain as an unswollen solid at temperatures up to about 45°C and at least 80% by weight of the polyvinyl alcohol will rapidly
svelle eller oppløses i vann ved temperaturer over ca. 80°C); swell or dissolve in water at temperatures above approx. 80°C);
forskjellige modifiseringsmidler som vannoppløselige harpikser (f .eks. oppløselig stivelse, dextrin, natriumcarboxymethylcellulose, various modifiers such as water-soluble resins (e.g. soluble starch, dextrin, sodium carboxymethylcellulose,
methoxycellulose, polyvinylalkohol, deres vannoppløselige deri-vater, etc.), eller vannoppløselige salter (f.eks. natriumsulfat, ammoniumsulfat, nat riumklorid, ammoniumklorid, kaliumklorid, calciumklorid eller nat riumacetat) ; ekstendere som leire, kaolin, bentonit , siliciumoxyd,'. diatomé jord, calciumcarbonat , aluminium-oxyd, stivelse, etc.; et geleringsmiddel som borsyre, borat, etc; methoxycellulose, polyvinyl alcohol, their water-soluble derivatives, etc.), or water-soluble salts (eg sodium sulfate, ammonium sulfate, sodium chloride, ammonium chloride, potassium chloride, calcium chloride or sodium acetate); extenders such as clay, kaolin, bentonite, silicon oxide,'. diatomaceous earth, calcium carbonate, aluminum oxide, starch, etc.; a gelling agent such as boric acid, borate, etc;
og eventuelt overflateaktive midler og hvis det er ønskelig å forbedre våtklebestyrken, aminoplaster. Spesifikke sammensetninger som er angitt, omfatter ca. 31 til 50 vekt% , beregnet ..på tørre materialer (dvs. unntatt vannet) av polyvinylalkohol, ca. and possibly surfactants and, if it is desired to improve the wet adhesive strength, aminoplasts. Specific compositions indicated include approx. 31 to 50% by weight, calculated ..on dry materials (ie excluding the water) of polyvinyl alcohol, approx.
44 til 56% leire og fra 0 til ca. 23% stivelse.44 to 56% clay and from 0 to approx. 23% starch.
I henhold til foreliggende oppfinnelse fremskaffes et forbedret preparat omfattende minst 15%, beregnet på vekten av det totale faststoff på tørr basis, av en potensielt klebende ugelatinert stivelse og- opptil 85%, beregnet på vekten av det totale faststoff på tørr basis, av en viskøs, gelatinert stivelsesbærer derfor, idet forbedringen består i å anvende i det nevnte preparat fra ca. 2 til ca. 20 vekt%, beregnet på den totale tilstedeværende stivelse, av polyvinylalkohol med en hydrolysegrad på fra ca. 99 til ca. 100%, en 4% vandig oppløsningsviskositet ved 20°C på fra ca. 5 til ca'. 6o cP, mindre enn ca. 3 vekt% koldt va nnopp-løselige stoffer ved 30°C, minst ca. 80 vekt% varmtvannoppløselige stoffer ved 70°C, idet minst ca. 95% av den nevnte polyvinylalkohol har en partikkelstørrelse under ca. 45 Hm og i det vesentlige alt av den nevnte polyvinylalkohol har en partikkelstørreise under ca . 75 M-m . According to the present invention, an improved preparation comprising at least 15%, calculated on the weight of the total solids on a dry basis, of a potentially adhesive ungelatinized starch and up to 85%, calculated on the weight of the total solids on a dry basis, of a viscous, gelatinized starch carrier therefore, as the improvement consists in using in the said preparation from approx. 2 to approx. 20% by weight, calculated on the total starch present, of polyvinyl alcohol with a degree of hydrolysis of from approx. 99 to approx. 100%, a 4% aqueous solution viscosity at 20°C of from approx. 5 to approx. 6o cP, less than approx. 3% by weight of cold water-soluble substances at 30°C, at least approx. 80% by weight of hot water-soluble substances at 70°C, with at least approx. 95% of the aforementioned polyvinyl alcohol has a particle size below approx. 45 Hm and essentially all of the aforementioned polyvinyl alcohol has a particle size below approx. 75 M-m .
Det har.vist seg at polyvinylalkohol (PVA) av fin partikkel-størrelse, som er fullt hydrolysert og av midlere molekylvekt, It has been found that polyvinyl alcohol (PVA) of fine particle size, which is fully hydrolyzed and of medium molecular weight,
er i det vesentlige uoppløselig i vann og upåvirket av borax ved 30°C, men lett oppløselig ved temperaturer i området fra ca. 70° til 85°C, er egnet i en vandig oppslemningsform i boratiserte stivelsespreparat er som et klebemiddel for bølgepapp. Forbausende nok har det vist seg at tilsetningen av en relativt liten mengde (2 - 20% beregnet på den totale stivelse) av denne spesielle PVA til konvensjonelle kommersielle bølgepappklebemidler tillater en is essentially insoluble in water and unaffected by borax at 30°C, but easily soluble at temperatures in the range from approx. 70° to 85°C, is suitable in an aqueous slurry form in boratized starch preparations is as an adhesive for corrugated board. Surprisingly, it has been found that the addition of a relatively small amount (2 - 20% calculated on the total starch) of this particular PVA to conventional commercial corrugated board adhesives allows a
betraktelig nedsettelse av det totalt anvendte klebemiddel. Reduksjon av klebemiddelpåføring på ca. 25 - 30% for vanlig bølge-papp og opptil. 50% for vannbeståndig bølgepapp har særlige for-deler innbefattende hurtigere produksjonshastigheter, lavere considerable reduction in the total amount of adhesive used. Reduction of adhesive application of approx. 25 - 30% for normal corrugated cardboard and up. 50% for water-resistant corrugated board has special advantages including faster production speeds, lower
energibehov for tørring av den klebede papp, nedsatt forvridning og lavere totalomkostninger ved fremstilling. Før denne oppdagelse har folk forsøkt i årtier å anvende polyvinylalkohol med stivelses-klebemiddel , og disse forsøk har alltid slått feil. Polyvinylalkohol kunne ikke anvendes til slikt bruk på grunn av reaksjonen av borax og oppløselige polyvinylalkoholfraksjoner som dannet en gel. Foreliggende oppfinnelse representerer for første gang at et polyvinylalkoholmodifiseringsmiddel for stivelse er blitt frem-skaffet som vil virke tilfredsstillende på kommersiell bølgepapp. Kombinasjonen av den ovennevnte polyvinylalkohol med kommersielle stivelsesbaserte borerte korrugeringsklebemidler gir et klebe-middelsystem som er egnet for å fremstille både vanlig og vannbestandig bølgepapp. energy required for drying the glued cardboard, reduced distortion and lower total costs during production. Before this discovery, people tried for decades to use polyvinyl alcohol with starch adhesive, and these attempts always failed. Polyvinyl alcohol could not be used for such use because of the reaction of borax and soluble polyvinyl alcohol fractions which formed a gel. The present invention represents for the first time that a polyvinyl alcohol modifier for starch has been produced which will work satisfactorily on commercial corrugated board. The combination of the above polyvinyl alcohol with commercial starch based borated corrugation adhesives provides an adhesive system suitable for making both plain and water resistant corrugated board.
Polyvinylalkoholen må, for å være anvendbar i henhold til foreliggende oppfinnelse for fremstilling av bølgepapp under anvendelse av borert stivelsesoppslemning, være boraxforlikelig inntil den påføres på det bølgede medium og derpå oppløses ved de temperaturer som foreligger på rullene, vanligvis ca. 70 - 85PC, selv ved 183 m/min kjøringshastigheter, for å gi godtagbar bind-ing. De fleste kommersielle kvaliteter av polyvinylalkohol inneholder mer eller mindre av en polymerfraksjon som er oppløselig i koldt vann (30°C). Denne lille mengde polyvinylalkohol som oppløses, vanligvis ca. 10% hvis ikke behandlet for å forbedre oppslemningsegenskapene, er mer enn tilstrekkelig til å reagere med den tilstedeværende borax og danne geler. Det har vist seg at polyvinylalkohol med koldtvannoppløselige stoffer i området 1 - The polyvinyl alcohol must, in order to be usable according to the present invention for the production of corrugated cardboard using boronated starch slurry, be borax-compatible until it is applied to the corrugated medium and then dissolves at the temperatures present on the rolls, usually approx. 70 - 85PC, even at 183 m/min travel speeds, to provide acceptable binding. Most commercial grades of polyvinyl alcohol contain more or less of a polymer fraction that is soluble in cold water (30°C). This small amount of polyvinyl alcohol that dissolves, usually approx. 10% if not treated to improve slurry properties is more than sufficient to react with the borax present and form gels. It has been shown that polyvinyl alcohol with cold water-soluble substances in the range 1 -
2% var forlikelig med så meget som 2% borax ved oppslemning ved værelsetemperatur. Det annet krav at polyvinylalkoholen skal opp-løses hurtig og nesten kvantitativt ved 70 - 85°C er vanskeligere å oppfylle. Oppløsningstemperaturen for polyvinylalkoholen avhenger hovedsakelig av polymerisasjonsgraden såvel som av hydrolysegraden. Jo høyere molekylvekten er, desto høyere temperatur kreves ved en gitt hydrolysegrad. Jo høyere hydrolysegraden er, desto høyere temperatur kreves for oppløsning. Oppløsningshastig-heten avhenger hovedsakelig av partikkelstørreisen, idet jo mindre partikkelstørrelsen er, desto hurtigere vil polyvinylalkoholen oppløses. 2% was comparable to as much as 2% borax when slurried at room temperature. The second requirement that the polyvinyl alcohol should dissolve quickly and almost quantitatively at 70 - 85°C is more difficult to fulfill. The dissolution temperature of the polyvinyl alcohol depends mainly on the degree of polymerization as well as on the degree of hydrolysis. The higher the molecular weight, the higher the temperature required for a given degree of hydrolysis. The higher the degree of hydrolysis, the higher the temperature required for dissolution. The dissolution rate mainly depends on the particle size, as the smaller the particle size, the faster the polyvinyl alcohol will dissolve.
•Polyvinylalkoholene egnet i foreliggende oppfinnelse har• The polyvinyl alcohols suitable in the present invention have
en hydrolysegrad på ca. 99 til 100%, en 4% vandig oppløsnings- a degree of hydrolysis of approx. 99 to 100%, a 4% aqueous soln.
viskositet ved 20°C på ca. 5 til ca. 6o cP, fortrinnsvis ca. 10 til ca. 15 cP. Polyvinylalkoholene har fin partikkelstørreise, minst ca. 95% av partiklene er finere enn 325 mesh (45 M-m), og i det vesentlige alle partikler er finere enn 200 mesh (75 |im) . viscosity at 20°C of approx. 5 to approx. 6o cP, preferably approx. 10 to approx. 15 cP. The polyvinyl alcohols have a fine particle size, at least approx. 95% of the particles are finer than 325 mesh (45 µm), and essentially all particles are finer than 200 mesh (75 µm).
Polyvinylalkoholene bør inneholde under ca. 3% koldtvanns-oppløselige stoffer (ved 30°C), fortrinnsvis mindre enn ca. 1%. Med andre ord vil minst 97%, fortrinnsvis 99%, av polyvinylalkoholen forbli som usvellet fast stoff ved 30°C. Koldtvanns-oppløselige stoffer bestemmes ved følgende laboratdrieprøve:~Omrør forsiktig 3-5% PVA i vann i 15 minutter ved 30°C, filtrer, tørr. filterkaken og beregn mengden av gjenvunnet PVA. The polyvinyl alcohols should contain less than approx. 3% cold water-soluble substances (at 30°C), preferably less than approx. 1%. In other words, at least 97%, preferably 99%, of the polyvinyl alcohol will remain as an unswollen solid at 30°C. Cold water-soluble substances are determined by the following laboratory test: ~ Gently stir 3-5% PVA in water for 15 minutes at 30°C, filter, dry. filter cake and calculate the amount of recovered PVA.
På den annen side bør polyvinylalkoholen være lett oppløse-lig ved høyere temperaturer, dvs. minst ca. 80% av polyvinylalkoholen bør være oppløselig ved 70°C. Disse oppløselighets-egenskaper er kritiske for å oppnå fordelene ved foreliggende oppfinnelse. Polyvinylalkohol med disse egenskaper kan frem-stilles ved varme-oppløsningsmiddelbehandlingen ifølge U.S. patent 3«654-247- Kort sagt går denne behandling ut på å oppvarme dispersjonen av polyvinylalkoholen ve'd en temperatur på 70 - 1'90°C i et flytende oppløsningsmiddel inneholdende 30 - 100% methanol , 0 - 30% vann og 0 - 45% av en 2 - 5 carbonatomholdig énverdig alkohol, methylacetat, aceton, ethylenglycol-dimethyl-ether, toluen, methylenklorid eller lignende. On the other hand, the polyvinyl alcohol should be easily soluble at higher temperatures, i.e. at least approx. 80% of the polyvinyl alcohol should be soluble at 70°C. These solubility characteristics are critical to achieving the benefits of the present invention. Polyvinyl alcohol with these properties can be produced by the heat-solvent treatment of U.S. Pat. patent 3«654-247- In short, this treatment involves heating the dispersion of the polyvinyl alcohol at a temperature of 70 - 1'90°C in a liquid solvent containing 30 - 100% methanol, 0 - 30% water and 0 - 45% of a monohydric alcohol containing 2 - 5 carbon atoms, methyl acetate, acetone, ethylene glycol dimethyl ether, toluene, methylene chloride or the like.
Mengden av polyvinylalkohol kan varieres fra ca. 2 tilThe amount of polyvinyl alcohol can be varied from approx. 2 more
ca. 20 vekt% av den totale stivelse som er tilstede, fortrinnsvis er den fra ca. 5 til ca. 10%. about. 20% by weight of the total starch present, preferably it is from approx. 5 to approx. 10%.
Foreliggende oppfinnelse angår forbedrede bølgepappklebe-midler erholdt ved å tilsette en relativt liten mengde av en spesiell PVA til konvensjonelle kommersielle klebemidler på stivelsesbasis for bølgepapp. Disse klebemidler på stivelsesbasis er beskrevet i U.S. patent 2.102.937 og 2.051.025, og disse publikasjoner inkorporeres her ved henvisning. Kort sagt er således foruten polyvinylalkoholbestanddelene av foreliggende klebemiddelpreparat som anvendes for fremstilling av vanlig bølgepapp, stivelse, alkali, borax og vann. Den anvendte stivelse kan være erholdt fra maisvåtmaling. Stivelsen er umodifisert og betegnes vanligvis som "perle"-stivelse eller "korrugerende" stivelse. Stivelsen utgjør i alminnelighet ca. 12 - 25% av klebemiddelpreparat et. Kaustisk soda anvendes for å gelatinere stivelsen i den primære (eller bærer-) del av klebemiddelfrem - stillingen. Natriumcarbonat-calciumhydratblanding eller natrium-hydroxyd anvendes vanligvis i dette gelatineringstrinn. Hydroxyd-delen av klebemidlet kan variere fra ca. 1 til 5% av den primære del avhengig av graden av ønsket gelatinering. Borax (natrium-borat) tilsettes i den annen eller potensielt klebende basisdel i en mengde på ca. 0,25% av den totale klebemiddelsammensetning. The present invention relates to improved corrugated board adhesives obtained by adding a relatively small amount of a special PVA to conventional commercial starch-based adhesives for corrugated board. These starch-based adhesives are described in U.S. Pat. patents 2,102,937 and 2,051,025, and these publications are incorporated herein by reference. In short, in addition to the polyvinyl alcohol components of the present adhesive preparation used for the production of ordinary corrugated board, starch, alkali, borax and water. The starch used can be obtained from maize wet grinding. The starch is unmodified and is usually referred to as "bead" starch or "corrugating" starch. The starch generally makes up approx. 12 - 25% of adhesive preparation et. Caustic soda is used to gelatinize the starch in the primary (or carrier) part of the adhesive production. Sodium carbonate-calcium hydrate mixture or sodium hydroxide is usually used in this gelatinization step. The hydroxide part of the adhesive can vary from approx. 1 to 5% of the primary part depending on the degree of gelatinization desired. Borax (sodium borate) is added to the second or potentially sticky base part in an amount of approx. 0.25% of the total adhesive composition.
■Resten av klebemiddelsammensetningen utgjøres av vann. ■The rest of the adhesive composition consists of water.
Klebemidler egnet for fremstilling av vannbestandig bølge-papp kan også sammensettes i henhold til foreliggende oppfinnelse. De er tilsvarende til de ovenfor beskrevne sammensetninger med Adhesives suitable for the production of water-resistant corrugated cardboard can also be composed according to the present invention. They are equivalent to the compositions described above with
den unntagelse at de også inneholder noe tverrbindingsmiddel som urea/formaldehyd-, keton/formaldehyd-, melamin/formaldehyd- eller resorcinol/formaldehyd-harpikser som gir fuktighets- og/eller vann-motstandsdyktighet i den dannede bølgepapp. Polyvinylalkoholen bør være tilstede, i en mengde fra ca. 2 til ca. 20%, beregnet på totalvekten av stivelsen, og tverrbindingsmidlet er tilstede i en mengde på ca. 2 - 20 vekt%, fortrinnsvis ca. 3 with the exception that they also contain some cross-linking agent such as urea/formaldehyde, ketone/formaldehyde, melamine/formaldehyde or resorcinol/formaldehyde resins which provide moisture and/or water resistance in the formed corrugated board. The polyvinyl alcohol should be present, in an amount from approx. 2 to approx. 20%, calculated on the total weight of the starch, and the cross-linking agent is present in an amount of approx. 2 - 20% by weight, preferably approx. 3
7 vekt%, av det totale stivelsesinnhold.7% by weight of the total starch content.
De følgende eksempler er gitt for å illustrere oppfinnelsen. Alle deler og prosenter er angitt i vekt hvor annet ikke spesielt er anført . The following examples are given to illustrate the invention. All parts and percentages are given by weight unless otherwise specifically stated.
Eksempel 1Example 1
Polyvinylalkohol med en hydrolysegrad på minst ca. 99%, en fin partikkelstørrelse (minst ca. 95% under 45 i^m, i det vesentlige alt under 75 ) , og en 4% vandig oppløs.ningsviskositet ved 20°C på 12 - 14 cP, ble oppløst i methanol og oppvarmet i 15 minutter ved 110°C i en autoklav for å nedsette koldtvannsoppløselighets-innholdet til et maksimum på 2%. Dette varmebehandlede materiale ble så anvendt til å modifisere kommersielle stivelsesbaserte klebemidler for korrugering, under anvendelse av en typisk omrørt kjele som følger: Polyvinyl alcohol with a degree of hydrolysis of at least approx. 99%, a fine particle size (at least about 95% below 45 µm, substantially all below 75 µm), and a 4% aqueous solution viscosity at 20°C of 12-14 cP, was dissolved in methanol and heated for 15 minutes at 110°C in an autoclave to reduce the cold water solubility content to a maximum of 2%. This heat-treated material was then used to modify commercial starch-based adhesives for corrugation, using a typical stirred boiler as follows:
Ovenstående preparater ble påført i standard bølgepapp-maskiner for fremstilling av bølgepapp under anvendelse av glatte lag og bølgelag av forskjellig vekt. The above preparations were applied in standard corrugated board machines for the production of corrugated board using smooth layers and corrugated layers of different weights.
Resultatene av de forskjellige forsøk utført med ovenstående preparater er angitt i tabell I. Kommersielt godtagbar bølgepapp ble fremstilt ved 122 - 137 m/min under anvendelse av den PVA-modifiserte sammensetning ved påføringer som var 10 - 15% lavere enn når den umodifiserte stivelses-kontrollsammensetning ble anvendt. Eksempelvis var i tilfelle av 205-127-205 bølgepapp, den gjennomsnittlige påføring under anvendelse av stivelse alene 8,54 g/m 2 sammenlignet med 7,08 g/m<?.>for PVA/stivelsesmodifisering. I tilfelle av tyngre bølgepapp ble økede ma skinhas.t ighet er anvendt under anvendelse av PVA/stivelsespreparat et sammenlignet med has-tighetene på 91 - 122 m/min som var typiske når preparater med bare den regulære stivelse ble anvendt. The results of the various tests carried out with the above preparations are set out in Table I. Commercially acceptable corrugated board was produced at 122 - 137 m/min using the PVA modified composition at application rates which were 10 - 15% lower than when the unmodified starch- control composition was used. For example, in the case of 205-127-205 corrugated board, the average application using starch alone was 8.54 g/m 2 compared to 7.08 g/m<?.>for PVA/starch modification. In the case of heavier corrugated board, increased machine speeds were used when using the PVA/starch preparation compared to the speeds of 91 - 122 m/min which were typical when preparations with only the regular starch were used.
Eksempel 2 Example 2
Duplikatpreparater som beskrevet i eksempel 1, ble fremstilt og anvendt for å fremstille bølgepapp ved forskjellige hastig-heter. Tabell II angir disse forsøk og de erholdte data. Duplicate preparations as described in example 1 were prepared and used to produce corrugated board at different speeds. Table II indicates these experiments and the data obtained.
Eksempel 3 Example 3
Dette eksempel illustrerer anvendelsen av en stivelse/polyvinylalkohol/harpiks-sammensetning ved fremstilling av vannbestandig bølgepapp. Sammensetningen ble fremstilt som følger: This example illustrates the use of a starch/polyvinyl alcohol/resin composition in the manufacture of water resistant corrugated board. The composition was prepared as follows:
Primær ( eller bærer-) delPrimary (or carrier) part
(1) Tilsett vann - 548,8 kg(1) Add water - 548.8 kg
(2) Tilsett stivelse - 90,7 kg(2) Add starch - 90.7 kg
(3) Oppvarm til 6o°C -.10 minutter(3) Heat to 6o°C -.10 minutes
(4) Tilsett flakformig kaustisk materiale - 12,7 kg(4) Add flaky caustic material - 12.7 kg
(5) Oppvarm til 74°C - hold i 15 minutter (6) Tillat å avkjøle til 38°C før tilsetning til sekundære del. (5) Heat to 74°C - hold for 15 minutes (6) Allow to cool to 38°C before addition to secondary portion.
Sekundær ( eller potensiell klebebasis-) delSecondary (or potential adhesive base) part
(1) Tilsett vann - 1778,1 kg(1) Add water - 1778.1 kg
(2) Tilsett borax - 8,6 kg(2) Add borax - 8.6 kg
(3) Tilsett stivelse - 408,2 kg(3) Add starch - 408.2 kg
(4) Tilsett polyvinylalkohol - 24,9 kg(4) Add polyvinyl alcohol - 24.9 kg
Ferdig<g>jøringDone<g>doing
(1) Tilsett det primære karinnhold til det sekundære kar under god omrøring. (2) Efter at tilsetningen er utført - omrør i 15 minutter (3) Tilsett 24,9 kg "Arares 7600" aceton-formaldehydharpiks tilgjengelig fra Pacific Resins and Chemicals. (1) Add the primary vessel contents to the secondary vessel while stirring well. (2) After the addition is made - stir for 15 minutes (3) Add 24.9 kg of "Arares 7600" acetone-formaldehyde resin available from Pacific Resins and Chemicals.
(4) Omrør i 30 minutter(4) Stir for 30 minutes
Ovenstående sammensetning ble anvendt for å fremstille vannbestandig bølgepapp med forskjellige mengder av klebemiddel på-ført det enkelte glatte lag. Resultatene av forskjellige forsøk er angitt i tabell III. Under anvendelse av kjente kommersielle stivelse/harpikssammensetninger er påføringer i området 17,1 - 22,0 g/m. (av stivelse og harpiks) nødvendig for å få bølgepapp med god vannbestandighet, dvs. bølgepapp som består ASTMd1028-59 vannbestandighetsprøven. The above composition was used to produce water-resistant corrugated cardboard with different amounts of adhesive applied to the individual smooth layers. The results of various experiments are given in Table III. Using known commercial starch/resin compositions, applications are in the range of 17.1 - 22.0 g/m. (of starch and resin) necessary to obtain corrugated board with good water resistance, i.e. corrugated board that passes the ASTMd1028-59 water resistance test.
Claims (1)
Applications Claiming Priority (1)
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US05/632,725 US4094718A (en) | 1975-11-17 | 1975-11-17 | Process of preparing corrugated paper board with a particular polyvinyl alcohol modified starch-based corrugating adhesive |
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NO763902L true NO763902L (en) | 1977-05-20 |
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1975
- 1975-11-17 US US05/632,725 patent/US4094718A/en not_active Expired - Lifetime
-
1976
- 1976-11-15 JP JP51136415A patent/JPS5262345A/en active Pending
- 1976-11-15 CA CA265,628A patent/CA1068025A/en not_active Expired
- 1976-11-16 FR FR7634446A patent/FR2331591A1/en active Pending
- 1976-11-16 GB GB47728/76A patent/GB1514630A/en not_active Expired
- 1976-11-16 NO NO763902A patent/NO763902L/no unknown
- 1976-11-16 SE SE7612789A patent/SE7612789L/en unknown
- 1976-11-17 DE DE19762652429 patent/DE2652429A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR2331591A1 (en) | 1977-06-10 |
DE2652429A1 (en) | 1977-05-18 |
JPS5262345A (en) | 1977-05-23 |
SE7612789L (en) | 1977-05-18 |
CA1068025A (en) | 1979-12-11 |
US4094718A (en) | 1978-06-13 |
GB1514630A (en) | 1978-06-14 |
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